Validators requires documentation

[camilamacedo86]

See that we have https://pkg.go.dev/github.com/operator-framework/api@v0.8.0/pkg/validation/, however, the validators available are their current options has not been properly documented.

That would be great to have a description of what is checked for each of them as all possible options available.

[camilamacedo86]

• PackageManifestValidator
• ClusterServiceVersionValidator
• CustomResourceDefinitionValidator
• BundleValidator
• OperatorHubValidator : Done: https://github.com/operator-framework/api/pull/159
• ObjectValidator
• OperatorGroupValidator
• CommunityOperatorValidator
• AlphaDeprecatedAPIsValidator
• DefaultBundleValidators